117413981 has 2 divisors, whose sum is σ = 117413982. Its totient is φ = 117413980.

The previous prime is 117413969. The next prime is 117413993. The reversal of 117413981 is 189314711.

It is a balanced prime because it is at equal distance from previous prime (117413969) and next prime (117413993).

It can be written as a sum of positive squares in only one way, i.e., 115369081 + 2044900 = 10741^2 + 1430^2 .

It is an emirp because it is prime and its reverse (189314711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117413981 - 2¹⁰ = 117412957 is a prime.

It is a super-2 number, since 2×117413981² = 27572085868536722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_6702677 and since 117413981 and 6702677 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117413911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58706990 + 58706991.

It is an arithmetic number, because the mean of its divisors is an integer number (58706991).

Almost surely, 2^117413981 is an apocalyptic number.

It is an amenable number.

117413981 is a deficient number, since it is larger than the sum of its proper divisors (1).

117413981 is an equidigital number, since it uses as much as digits as its factorization.

117413981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 117413981 is about 10835.7732072981. The cubic root of 117413981 is about 489.6735031689.

The spelling of 117413981 in words is "one hundred seventeen million, four hundred thirteen thousand, nine hundred eighty-one".